Touchscreen Inverse X

[pt4si3k83]

Hi,
I successfully installed the latest build on Rpi4 and I'm using 22inches LCD monitor with USB touchscreen. Touchscreen is being detected by system as 'XDTouch IrTouchScreen' . Everything works fine BUT its X axis is inverted. I spent alot of time trying to do so, but I don't know "freon" at all.

If there was an XOrg then adding the following part to 'xorg.conf' would do the trick:
Section "InputDevice"
Identifier "touchscreen"
Driver "evdev"
(...)
Option "InvertX" "True"
EndSection

Is there any chance to configure it?

[yunshansimon]

The input device configuration files are at /etc/gesture.

[pt4si3k83]

Thank you @yunshansimon . I'm trying to configure it in the same way (or similar) I did on Raspbian, but it seems to not working at all. Can you tell me where can I find UI logs so that I could see whether my configuration is being read at all? Is there any log file - something like 'xorg.log' ?

[yunshansimon]

/var/log/ui/ui.* : graphic related logs.
/var/log/chrome/chrome : chrome main logs.
evtest : the command for testing input device.

[pt4si3k83]

Hey, I tried to modify one of the file which is already in /etc/gestures. I tried to create a new one there with my configuration. Unfortunatelly there were no change in the system nor any information in any log file.

Are the /etc/gestures/*.conf files being used at all?

[pt4si3k83]

Is there any way to recompile the kernel module (usbtouchscreen.c) on my RPi4 to add a support for "InvertX" parameter? I was searching for this over the internet but I didn't find any useful information (instructions).

[pt4si3k83]

I managed to rebuild usbtouchscreen kernel module to support invert_x parameter and now it works fine. My issue with X axis seems to be solved.

However I think there still might be something wrong with /etc/gestures/*.conf files support.